What is "sleuthed"

Usage examples of "sleuthed".

This information didn't fall in my lap, it had to be painstakingly sleuthed out.

He sleuthed alone in the musty stacks, he hovered over the mahogany drawers lined with vellum manuscripts.

Later I discovered that when Hilda went off to shop in Harrods she spotted me coming out of Knightsbridge tube station, a place far removed from the Temple and the Old Bailey, and sleuthed me to a house in Mowbray Crescent which she saw me enter when the front door was opened by the aforesaid Tatiana Fern.